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A008325 Number of simple regular trivalent bipartite graphs with 2n nodes. 5
1, 1, 2, 6, 14, 41, 157, 725, 4196, 29816, 246644, 2297075, 23503477, 260265023 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,3

COMMENTS

Euler transform of A006823. - Peter J. Taylor, Sep 28 2017

REFERENCES

G. Brinkmann, Fast generation of cubic graphs, J. Graph Theory 23 (1996), no. 2, 139-149.

LINKS

Table of n, a(n) for n=3..16.

Sean A. Irvine, On the difference between A004066 and A008325

CROSSREFS

Cf. A006823 (bicolored), A006823 (unconnected).

A (right-hand) column of triangle A008326.

Sequence in context: A151538 A284998 A009423 * A004066 A123383 A225172

Adjacent sequences:  A008322 A008323 A008324 * A008326 A008327 A008328

KEYWORD

nonn,hard

AUTHOR

Brendan McKay

EXTENSIONS

a(15) and a(16) from Peter J. Taylor, Sep 28 2017

STATUS

approved

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Last modified October 19 03:54 EDT 2019. Contains 328211 sequences. (Running on oeis4.)